Preparation:

In an 8-quart pot or Dutch oven, heat the olive oil over medium heat. Add the onions and the garlic and cook until softened and golden brown, 20 to 25 minutes. Stir in the turmeric and cook until fragrant, 1 minute. Transfer one-third of the onions to a bowl for garnish, set aside.

To the onion mixture, add the water, navy beans, kidney beans, chickpeas, lentils and salt, then bring to a simmer. Reduce the heat to achieve a low simmer and cook, covered, until the beans are tender, 30 to 35 minutes.

Stir in the spinach, parsley, cilantro and scallions and cook until dark green, 10 minutes. Add the pasta and continue to simmer until the noodles are tender, 10 to 12 minutes. Adjust seasoning with salt. Divide between bowls, garnish with reserved onions, yogurt and mint leaves, then serve.